Negative Controls That Matter
Independent Voices
RF Safe
Jan 14, 2026
RF Safe argues that “no effect” findings in some RF exposure studies should be interpreted as meaningful negative controls rather than as evidence that RF has no biological effects. The post presents RF Safe’s “S4–Mito–Spin” framework, claiming certain skin cell types (fibroblasts and keratinocytes) are predicted to…
Why the 2025 “5G Skin-Cell Null” Actually Confirms the Density-Dependence of Both Pillars of the Unified Framework
Independent Voices
RF Safe
Nov 24, 2025
RF Safe comments on a 2025 PNAS Nexus study (Jyoti et al., 2025) reporting no detectable changes in gene expression or methylation in 5G millimeter-wave–exposed human skin cells. The post argues that this “null” result does not indicate biological inertness, but instead supports the site’s proposed “dual-pillar”…
5G-exposed human skin cells do not respond with altered gene expression and methylation profiles
Research
RF Safe Research Library
Jan 1, 2025
This in vitro study exposed human skin cells (fibroblasts and keratinocytes) to 5G-band electromagnetic fields for 2 hours and 48 hours using a fully blinded design. Exposures were up to ten times permissible limits, with sham exposure as a negative control and UV exposure as a positive control. The study reports…
Effect of Electromagnetic Field on Proliferation and Migration of Fibroblasts and Keratinocytes: Implications in Wound Healing and Regeneration.
Research
RF Safe Research Library
Jan 1, 2024
This narrative review discusses reported effects of EMF, including low-frequency EMF (LF-EMF), on cell behaviors relevant to wound healing and on recovery processes after traumatic brain injury (TBI). It summarizes literature suggesting EMF can promote migration and proliferation of fibroblasts, keratinocytes, and…
Low-frequency electromagnetic field influences human oral mucosa keratinocyte viability in response to lipopolysaccharide or minocycline treatment in cell culture conditions.
Research
RF Safe Research Library
Jan 1, 2021
This in vitro study examined whether low-frequency electromagnetic field (LF-EMF) exposure affects viability of human oral mucosa keratinocytes. Apoptosis (early/late) and necrosis were measured by flow cytometry, including conditions with lipopolysaccharide (LPS) or minocycline. The authors report that LF-EMF, alone…
Fas/FasL pathway and cytokines in keratinocytes in atopic dermatitis - Manipulation by the electromagnetic field.
Research
RF Safe Research Library
Jan 1, 2018
This in vitro study exposed keratinocytes from atopic dermatitis patients and healthy controls, plus two keratinocyte cell lines, to a 900 MHz electromagnetic field for 60 minutes. AD-derived keratinocytes showed higher Fas/FasL signaling markers and increased secretion of multiple cytokines versus controls. EMF…
Extremely low-frequency electromagnetic fields accelerates wound healing modulating MMP-9 and inflammatory cytokines.
Research
RF Safe Research Library
Jan 1, 2018
This in vitro study used a scratch wound model in human immortalized keratinocytes (HaCaT) to examine effects of extremely low-frequency electromagnetic fields (ELF-EMF). ELF-EMF exposure was reported to accelerate wound closure compared with sham and to increase inflammatory cytokine expression/release. The authors…
Effect of extremely low-frequency electromagnetic fields on antioxidant activity in the human keratinocyte cell line NCTC 2544.
Research
RF Safe Research Library
Jan 1, 2017
This in vitro study exposed human keratinocyte cells (NCTC 2544) to 50 Hz ELF-EMF at 0.25–2 G and assessed oxidative stress-related endpoints. Significant increases in ROS were reported at 0.5 and 1 G, with associated short-term changes in antioxidant and lipid peroxidation markers. The authors report that…
Experimental model for ELF-EMF exposure: Concern for human health.
Research
RF Safe Research Library
Jan 1, 2015
This in vitro study examined whether extremely low frequency EMF exposure alters MCP-1 expression in several human cell lines. Cells were exposed to a 50 Hz sinusoidal field at 1 mT (rms), and the authors report that MCP-1 expression was modified in a cell-type-dependent manner. The findings are described as…
Human keratinocytes in culture exhibit no response when exposed to short duration, low amplitude, high frequency (900 MHz) electromagnetic fields in a reverberation chamber.
Research
RF Safe Research Library
Jan 1, 2011
This in vitro study exposed normal human epidermal keratinocytes to non-thermal 900 MHz electromagnetic fields in a mode-stirred reverberation chamber under two short-duration conditions. Microarray analysis found only limited gene modulation (20 genes) with small expression ratios and no shared genes across…